[nws-changes] 20110601: Addl RTMA products on NOAAPORT Fwd: ADMIN NOTICE NOUS41 KWBC

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: [nws-changes] 20110601: Addl RTMA products on NOAAPORT Fwd: ADMIN NOTICE NOUS41 KWBC
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Wed, 01 Jun 2011 08:23:16 -0600

-------- Original Message --------

469
NOUS41 KWBC 011411
PNSWSH

Technical Implementation Notice 11-20
National Weather Service Headquarters Washington DC
1010 AM EDT Wed Jun 1 2011

To:       Subscribers:
          -Family of Services
          -NOAA Weather Wire Service
          -Emergency Managers Weather Information Network
          -NOAAPORT
          Other NWS partners and NWS employees

From:     Tim Mcclung
          Chief, Science Plans Branch
          Office of Science and Technology

Subject:  Addition of 2.5 km RTMA Products to NOAAPORT

The National Centers for Environmental Prediction (NCEP) is now
disseminating new Real Time Mesoscale Analysis (RTMA) products
for the contiguous United States (CONUS) on NOAAPORT.  The RTMA
is a set of gridded surface analyses and surface analysis
uncertainty fields made available at an hourly temporal
frequency. The CONUS RTMA was previously only available on
NOAAPORT at a horizontal resolution of 5 kilometers (km). These
new RTMA products have a horizontal resolution of 2.5 km.

The grids listed in Table 1 below are available at a resolution
of 2.5 km. The GOES effective cloud amount is not available at
the 2.5 km resolution and will continue to be provided at a
horizontal resolution of 5 km.

The intention is to remove the 5km RTMA products (with the
exception of the GOES effective cloud amount) from NOAAPORT and
all other distribution methods once sufficient time has passed
to allow necessary software upgrades. A separate announcement
will be sent prior to removing the 5km products.

Table 1:  CONUS RTMA products available at 2.5 km resolution and
their associated WMO headers

WMO Header     RTMA Parameter

LTIA98 KWBR    temperature
LTIA98 KWBR    temperature analysis uncertainty
LRIA98 KWBR    dewpoint temperature
LRIA98 KWBR    dewpoint temperature uncertainty
LNIA98 KWBR    wind speed
LNIA98 KWBR    wind speed analysis uncertainty
LNIA98 KWBR    wind direction
LNIA98 KWBR    wind direction analysis uncertainty
LUIA98 KWBR    u wind component
LVIA98 KWBR    v wind component
LEIA98 KWBR    accumulated precipitation
LPIA98 KWBR    surface pressure analysis
LPIA98 KWBR    surface pressure analysis uncertainty
LHIA98 KWBR    model terrain height


The RTMA data for the CONUS is also available from NDGD at:

ftp://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.r
tma/AR.conus

and on the NCEP server at:

http://www.ftp.ncep.noaa.gov/data/nccf/com/rtma2p5/prod
or
ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/rtma2p5/prod

There are three files for each hour located on the NCEP server.
Files with names such as rtma2p5.t00z.2dvaranl_ndfd.grb2 contain
all of the RTMA analysis fields and the associated errors, with
the exception of precipitation.

Files with names such as rtma2p5.t00z.2dvarges_ndfd.grb2 contain
the first guess fields used by the RTMA.  Files with names such
as rtma2p5.t00z.pcpn_ndfd.grb2 contain the precipitation
analysis.

NCEP will continue to refine the RTMA.  Users may provide
feedback on the experimental RTMA products at:

http://www.weather.gov/survey/nws-survey.php?code=rtma

For questions regarding the RTMA, please contact:

  Geoff Dimego
  NCEP/Environmental Modeling Branch
  Camp Springs, MD 20746
  301-763-8000 x 7221
  geoff.dimego@xxxxxxxx

For questions regarding the dataflow aspects of these data
sets please contact:

  Rebecca Cosgrove
  NCEP/NCO Dataflow Team
  Camp Springs, Maryland 20746
  301-763-8000 X 7198
  ncep.list.pmb-dataflow@xxxxxxxx

National Technical Implementation Notices are online at:

http://www.weather.gov/os/notif.htm

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